Tag Archives: water department

Do you have an irrigation system and are interested in saving money on your increasingly expensive San Francisco water bill? Consider applying for a reduced “flow factor.”

A big part of your water bill as a homeowner in San Francisco is the wastewater service charge that covers the cost of collecting, transporting, treating and disposing of each unit of wastewater discharged into the sewer system. The Water Department figures this out by multiplying your water consumption by an assigned “flow factor.”

The flow factor is the amount of water you use that’s actually returned to the sewer system as wastewater. The Water Department assumes the flow factor to be 90% for single-family homes and 95% for multi-unit buildings.… Continue Reading